I keep not getting around to joining in, but apparently there’s been a fair bit of mostly-Alliance RP happening these days in Duskwood, which I believe was spearheaded by Thomas Bates.
It might also be easier to find people in the right place at the right time by checking out the Wyrmrest Community Project, which as I understand it is not Alliance-only but has been Alliance-focused in an effort to revitalize the Alliance RP community.